The reason I asked is I have two humbuckers in my Strat that are wired to a P-Model Megaswitch which gives Paul Reed Smith pickup combinations. Those are:
Position 1: Bridge Pickup
Position 2: Inner pickup coils, parallel
Position 3: Outer coils, series
Position 4: Outer coils, parallel
Position 5: Neck Pickup
http://www.stewmac.com/shop/Electronics,_pickups/Components:_Switches_and_knobs/2/Megaswitches/Instructions/I-3530.html#details
I just wasn't sure what the difference in Series and Parallel was. All useful sounds, though!